html,body {
    background-color: #e9e9e9;
}

#center {
    position: absolute;
    left: 50%;
    top: 50%;
}

#playground {
    position: absolute;
    width: 900px;
    height: 500px;
    left: -450px;
    top: -250px;
    background-color: #e9e9e9;
    border: 1px solid #bbbbbb;
    padding: 5px;
}

.hablar {
    padding: 1px;
    background-color: #bBBBBB;
}

#vertical_div {
    position: absolute;
    left: -150px;
    width: 300px;
    top: 5%;
    height: 90%;
}

#vertical_dock_div {
    position: absolute;
    left: -250px;
    width: 500px;
    top: 5%;
    height: 90%;
}

#horizontal_div {
    position: absolute;
    left: -350px;
    width: 700px;
    top: 15%;
    height: 70%;
}
